person = {
	"first_name": 'Jackie',
	"last_name": 'chan',
	"age": 70,
	"city": 'hongkong',
}

for k, v in person.items():
	print(f"{k}: {v}")

print("k, v test ok.=============")

for k in person.keys():
	print(f"{k}:{person.get(k)}")

print("keys test ok==============")

for v in person.values():
	print(f"values:{v}")
print("values test ok==============")
# 集合，不允许重复，列表可以重复
names = {'zhangsan', 'zhangsan'}
for name in names:
	print(name)
